Detecting Mercury (II) and Thiocyanate Using “Turn-on” Fluorescence of Graphene Quantum Dots

In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg 2+ . Quenching was far less efficient with other similar heavy...

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Published inJournal of fluorescence Vol. 30; no. 5; pp. 1181 - 1187
Main Authors Askari, Faezeh, Rahdar, Abbas, Dashti, Mohadeseh, Trant, John F.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.09.2020
Springer Nature B.V
Subjects
Analytical Chemistry
Biochemistry
Biological and Medical Physics
Biomedical and Life Sciences
Biomedicine
Biophysics
Biotechnology
Citric acid
Contaminants
Fluorescence
Fluorescent Dyes - chemical synthesis
Fluorescent Dyes - chemistry
Graphene
Graphite - chemistry
Heavy metals
Lead
Mercury (metal)
Mercury - analysis
Original Article
Quantum dots
Quantum Dots - chemistry
Spectrometry, Fluorescence
Thiocyanates
Thiocyanates - analysis
fluorescent detection
Graphene quantum dot
Hg
SCN
Hg2
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Abstract In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg 2+ . Quenching was far less efficient with other similar heavy metals, Tl + , Pb 2+ and Bi 3+ . Fluorescence could be near quantitatively restored through the introduction of thiocyanate. This “turn-on” fluorescence can thus be used to detect both or either environmental and physiological contaminants mercury and thiocyanate and could prove useful for the development of simple point-of-care diagnostics in the future. Graphical Abstract
AbstractList In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg 2+ . Quenching was far less efficient with other similar heavy metals, Tl + , Pb 2+ and Bi 3+ . Fluorescence could be near quantitatively restored through the introduction of thiocyanate. This “turn-on” fluorescence can thus be used to detect both or either environmental and physiological contaminants mercury and thiocyanate and could prove useful for the development of simple point-of-care diagnostics in the future. Graphical Abstract
In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg2+. Quenching was far less efficient with other similar heavy metals, Tl+, Pb2+ and Bi3+. Fluorescence could be near quantitatively restored through the introduction of thiocyanate. This “turn-on” fluorescence can thus be used to detect both or either environmental and physiological contaminants mercury and thiocyanate and could prove useful for the development of simple point-of-care diagnostics in the future.
In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg . Quenching was far less efficient with other similar heavy metals, Tl , Pb and Bi . Fluorescence could be near quantitatively restored through the introduction of thiocyanate. This "turn-on" fluorescence can thus be used to detect both or either environmental and physiological contaminants mercury and thiocyanate and could prove useful for the development of simple point-of-care diagnostics in the future. Graphical Abstract.
Author Rahdar, Abbas
Askari, Faezeh
Dashti, Mohadeseh
Trant, John F.
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Snippet In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The...
In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The...
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SubjectTerms Analytical Chemistry
Biochemistry
Biological and Medical Physics
Biomedical and Life Sciences
Biomedicine
Biophysics
Biotechnology
Citric acid
Contaminants
Fluorescence
Fluorescent Dyes - chemical synthesis
Fluorescent Dyes - chemistry
Graphene
Graphite - chemistry
Heavy metals
Lead
Mercury (metal)
Mercury - analysis
Original Article
Quantum dots
Quantum Dots - chemistry
Spectrometry, Fluorescence
Thiocyanates
Thiocyanates - analysis
Title Detecting Mercury (II) and Thiocyanate Using “Turn-on” Fluorescence of Graphene Quantum Dots
URI https://link.springer.com/article/10.1007/s10895-020-02586-z
https://www.ncbi.nlm.nih.gov/pubmed/32691262
https://www.proquest.com/docview/2437147511
https://search.proquest.com/docview/2425898530
Volume 30
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